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受欢迎的代数 >

(x-4)+(9x+4)+(2x+12)=180

解答

(x - 4) + (9 x + 4) + (2 x + 12) = 180

解答

x = 14

求解步骤

(x - 4) + (9 x + 4) + (2 x + 12) = 180

去除括号:

(a) = a

x - 4 + 9 x + 4 + 2 x + 12 = 180

对同类项分组

x + 9 x + 2 x - 4 + 4 + 12 = 180

同类项相加:

x + 9 x + 2 x = 12 x

12 x - 4 + 4 + 12 = 180

数字相加/相减:

- 4 + 4 + 12 = 12

12 x + 12 = 180

将

12

到右边

12 x = 168

两边除以

12

x = 14

作图

流行的例子

5 x - 2 (3 x + 1) = - 9

solvefor A,f=D+A

so l v e f or A, f = D + A

9y-(2y-3)=5(y-2)+2y

9 y - (2 y - 3) = 5 (y - 2) + 2 y

2 x - 50 = 0

\frac{x + 2}{3} = \frac{8}{9}